>>712

\documentclass[a4j,ja=standard,lualatex]{bxjsarticle}
\usepackage{xparse,tikz}
\ExplSyntaxOn
\NewDocumentCommand\hoge{m}{%
\exp_args:NNo \str_set:Nn \l_tmpa_str {#1番目のアルファベットだってよm9(^Д^)ﾌﾟｷﾞｬｰ}
\int_case:nnF {#1}
{
{1}{a}{2}{b}{3}{c}{4}{d}{5}{e}{6}{f}{7}{g}{8}{h}{9}{i}{10}{j}{11}{k}{12}{l}{13}{m}
{14}{n}{15}{o}{16}{p}{17}{q}{18}{r}{19}{s}{20}{t}{21}{u}{22}{v}{23}{w}{24}{x}{25}{y}{26}{z}
}{\str_use:N \l_tmpa_str}
}
\ExplSyntaxOff
\begin{document}
\foreach\N in {0,1,...,30}{\hoge{\N}\par}%
\end{document}